from django.shortcuts import render

# Create your views here.
from django.views import View
from django.views.generic import View
from goods.models import GoodsCategory, GoodsChannel
from contents.models import ContentCategory
from collections import OrderedDict


class HomeView(View):
    def get(self, request):
        # 需要先验证数据是否正确

        # 1.把数据查询出来
        # 使用有序字典保存类别的顺序
        # categories = {
        #     1: { # 组1
        #         'channels': [{'id':, 'name':, 'url':},{}, {}...],
        #         'sub_cats': [{'id':, 'name':, 'sub_cats':[{},{}]}, {}, {}, ..]
        #     },
        #     2: { # 组2
        #
        #     }
        # }
        # 初始化存储容器
        categories = OrderedDict()
        # 获取一级分类
        channels = GoodsChannel.objects.order_by('group_id', 'sequence')

        # 对一级分类进行遍历
        for channel in channels:
            # 获取group_id
            group_id = channel.group_id
            # 判断group_id 是否在存储容器,如果不在就初始化
            if group_id not in categories:
                categories[group_id] = {
                    'channels': [],
                    'sub_cats': []
                }

            one = channel.category
            # 为channels填充数据
            categories[group_id]['channels'].append({
                'id': one.id,
                'name': one.name,
                'url': channel.url
            })
            # 为sub_cats填充数据
            for two in one.goodscategory_set.all():
                # 初始化 容器
                two.sub_cats = []
                # 遍历获取
                for three in two.goodscategory_set.all():
                    two.sub_cats.append(three)

                # 组织数据
                categories[group_id]['sub_cats'].append(two)

        # 广告和首页数据
        contents = {}
        content_categories = ContentCategory.objects.all()
        # content_categories = [{'name':xx , 'key': 'index_new'}, {}, {}]

        # {
        #    'index_new': [] ,
        #    'index_lbt': []
        # }
        for cat in content_categories:
            contents[cat.key] = cat.content_set.filter(status=True).order_by('sequence')

        context = {
            'categories': categories,
            'contents': contents
        }

        # 2.在模板中渲染一下就可以
        return render(request, 'index.html', context)


# 所谓的静态化技术就是将查询好的数据填充到模板中，然后将生成的html写入到指定文件夹中

# 热销排行
from rest_framework.generics import GenericAPIView
from rest_framework.generics import ListAPIView
from goods.models import SKU
from users.serializers import SKUSerialzier
from rest_framework.response import Response
from rest_framework.filters import OrderingFilter

# class HotSKUView(GenericAPIView):
# # """
# #     GET     /goods/categories/(?P<category_id>\d+)/hotskus/
# #     1.需要前段传递一个商品分类的id
# #     2.根据商品分类的id查询商品的数据,对数据进行排序处理,同时限制查询结果集
# #     3.将模型结果转换为JSON,返回回去
# #     ""
#     def get(self,request,category_id):
#         skus = SKU.objects.filter(category_id=category_id,is_launched=True).order_by('-sales')[:2]
#         serializer = SKUSerialzier(instance=skus,many=True)
#         return Response(serializer.data)

# 2
class HotSKUView(ListAPIView):
    """
        排序,设置 筛选后台,设置筛选字段
        分页
        """

    serializer_class = SKUSerialzier

    def get_queryset(self):
        category_id = self.kwargs.get('category_id')

        return SKU.objects.filter(category_id=category_id, is_launched=True)

    # 排序
    filter_backends = [OrderingFilter]
    ordering_fields = ['sales', 'price', 'create_time']

class SKUListAPIView(ListAPIView):

    serializer_class = SKUSerialzier
    def get_queryset(self):
        category_id = self.kwargs.get('category_id')
        return SKU.objects.filter(category_id=category_id,is_launched=True)
    # 排序
    filter_backends = [OrderingFilter]
    ordering_fields = ['sales', 'price', 'create_time']

